The sheaths surround central arteries within the spleen and contain T lymphocytes that attack foreign bodies as the blood is filtered into the spleen. The lymphatic nodules are where B-lymphocytes predominate, producing antibodies to coat pathogens and flag them up for removal by scavenger cells.
Does the spleen activate lymphocytes?
The white pulp is a major domain of lymphocyte activation in the spleen and its involvement in the immune response to blood circulating antigens has been well reported (Kopp 1990). Moreover, the spleen has been identified as an important site for lymphocyte proliferation and macrophage maturation (Tischendorf 1985).
How is the spleen involved in the immune response?
The spleen plays an important role in your immune system response. When it detects bacteria, viruses, or other germs in your blood, it produces white blood cells, called lymphocytes, to fight off these infections.
Can I produce antibodies without a spleen?
Some fight infections indirectly, by assisting the direct fighters or by producing antibodies that mark pathogens for destruction by other white blood cells. Fortunately for people who do not have a spleen, the body has other lymphoid tissues containing white blood cells, such as lymph nodes.
Does the spleen release hormones?
The last ten years do not seem to have brought forward any decisive fact and it may be assumed that the results reported in this paper constitute the first experimental evidence that the spleen produces and can release into circulation a substance acting like a hormone.
What is the function of white pulp in the spleen?
Both white and red pulp contains lymphocytes and immune cells called macrophages. These cells dispose of antigens, dead cells, and debris by engulfing and digesting them. While the spleen functions chiefly to filter blood, it also stores red blood cells and platelets.
What does the spleen do in the body?
The spleen is a small organ inside your left rib cage, just above the stomach. It’s part of the lymphatic system (which is part of the immune system). The spleen stores and filters blood and makes white blood cells that protect you from infection. Many diseases and conditions can affect how the spleen works.
What is splenic flexure syndrome and what causes it?
Splenic flexure syndrome is a condition that causes gas to become trapped inside flexures — or curves — within your colon. Your splenic flexure is in the sharp bend between your transverse colon and descending colon in your upper abdomen. It’s situated next to your spleen.
What is the hilum of the spleen?
It’s covered in visceral peritoneum, a smooth membrane that’s composed of two layers of cells, which secrete fluid and serve a protective function. 1 There is, however, an opening in this membrane called the hilum of the spleen, which allows the splenic artery and vein to circulate blood to the organ.
What are the causes of spleen problems?
Many disorders, conditions, injuries and diseases can cause problems in the spleen. These problems include: Enlarged spleen (splenomegaly): Several conditions can cause the spleen to swell and get too big. An enlarged spleen can cause pain and an uncomfortable feeling of fullness, even if you haven’t eaten much.
